Core network system

Abstract

A core network system is provided. The core network system includes: a terminal and multiple core network functions. The terminal and at least one of the multiple core network functions directly exchange information through a Service-Based Architecture (SBA) interface.

1 . A core network system, comprising:
 a terminal; and multiple core network functions, wherein the terminal and at least one of the multiple core network functions directly exchange information through a Service-Based Architecture (SBA) interface.   
     
     
         2 . The core network system according to  claim 1 , wherein the core network functions comprise at least one of the following:
 a Non-Access Stratum (NAS) security function, configured to provide at least one of the following services: initial authentication and secret key generation services, a security mode establishment service, a NAS message ciphering service, or a NAS message decryption service;   a context management function, configured to provide at least one of the following services: a terminal context query service or a terminal context update service;   a network element selection function, configured to provide at least one of the following services: selecting a required core network function for the terminal according to terminal requirements, or selecting, for the target network function, a core network function to be enabled, or   a statistical information management function, configured to provide services comprising: statistics collection or feedback of target information.   
     
     
         3 . The core network system according to  claim 2 , wherein the NAS security function is configured to provide a terminal security context for a target core network function before the target core network function communicates with the terminal. 
     
     
         4 . The core network system according to  claim 2 , wherein the network element selection function is configured to select, for the terminal according to a type of a service requested by the terminal, a core network function capable of providing the service. 
     
     
         5 . The core network system according to  claim 1 , wherein the core network functions comprise at least one of the following:
 an access control function, configured to provide access services and initial registration services for the terminal; or   a mobility management function, configured to provide mobility management services for the terminal.   
     
     
         6 . The core network system according to  claim 5 , wherein:
 the access control function and the mobility management function are two independent core network functions, or   the access control function and the mobility management function are a same core network function.   
     
     
         7 . The core network system according to  claim 1 , wherein the core network functions comprise at least one of the following:
 a subscription management function;   a session management function;   a location service function; or   a Short Message Service (SMS) function.   
     
     
         8 . The core network system according to  claim 1 , wherein a NAS message transmitted through the SBA interface comprises indication information, and the indication information is used to indicate a core network function communicating with the terminal. 
     
     
         9 . The core network system according to  claim 1 , wherein the SBA interface satisfies one of the following:
 implementation based on a Restful interface;   implementation based on a Restful enhanced interface; or   implementation based on a target SBA service interface protocol.   
     
     
         10 . The core network system according to  claim 1 , wherein services provided by the core network system for the terminal comprise at least one of the following:
 an initial registration service for the terminal;   an authentication and authorization service for the terminal;   a security establishment service for the terminal;   a mobility management service for the terminal;   a session establishment service for the terminal;   a session modification or release service for the terminal;   a security update service for the terminal;   a short message service for the terminal;   a location service for the terminal;   a subscription-related configuration parameter update service; or   a statistical information request service for the terminal.